f = spfun('function',S)
f = spfun('function',S)
evaluates function(S)
on the nonzero elements of S
. function
must be the name of a function, usually defined in an M-file, which can accept a matrix argument, S
, and evaluate the function at each element of S
.
f = spfun('exp',S)
has the same sparsity pattern as S
(except for underflow), whereas exp(S)
has 1s where S
has 0s.(c) Copyright 1994 by The MathWorks, Inc.